Roll build/ 1a541c158..9b01e295f (100 commits)1a541c1582..9b01e295f8
$ git log 1a541c158..9b01e295f --date=short --no-merges --format='%ad %ae %s' 2020-07-17 chromium-autoroll Roll Fuchsia SDK from 0.20200717.0.1 to 0.20200717.1.1 2020-07-17 chromium-autoroll Roll Fuchsia SDK from 0.20200716.2.1 to 0.20200717.0.1 2020-07-17 sdefresne [ios] Force target to be dirty if xcode_version changes 2020-07-17 mheikal Remove unneeded extra_r_text_files from resource management 2020-07-17 bpastene Reland #2: "Split the cros_boards gclient var into two for fetching QEMU images." 2020-07-17 wnwen Android: Add direct deps for turbine 2020-07-17 thomasanderson [XProto] Remove usage of XCursor 2020-07-16 liaoyuke [lacros] Add functions to download ash-chrome in the test runner 2020-07-16 chromium-autoroll Roll Fuchsia SDK from 0.20200716.1.1 to 0.20200716.2.1 2020-07-16 liaoyuke [lacros] Fix argument helper 2020-07-16 wfh Turn on CFG linker config and bitmap generation for DLLs. 2020-07-16 liaoyuke [lacros] Fix build/lacros OWNERS file 2020-07-16 wnwen Android: More direct deps for turbine 2020-07-16 wnwen Android: Direct deps for //net 2020-07-16 bpastene Revert "Reland "Split the cros_boards gclient var into two for fetching QEMU images."" 2020-07-16 wnwen Android: Direct deps for //media 2020-07-16 sdefresne [ios] Force target to be dirty if xcode_version changes 2020-07-16 chromium-autoroll Roll Fuchsia SDK from 0.20200716.0.1 to 0.20200716.1.1 2020-07-16 chromium-autoroll Roll Fuchsia SDK from 0.20200715.2.1 to 0.20200716.0.1 2020-07-16 wnwen Android: Direct deps for chrome/android etc 2020-07-16 liaoyuke [lacros] Generate a test runner wrapper for lacros 2020-07-15 wnwen Android: Prefer direct deps for turbine 2020-07-15 chromium-autoroll Roll Fuchsia SDK from 0.20200715.1.1 to 0.20200715.2.1 2020-07-15 wnwen Android: Add new build speed benchmarks 2020-07-15 bpastene Reland "Split the cros_boards gclient var into two for fetching QEMU images." 2020-07-15 torne android: use final_android_sdk when setting versionCode. 2020-07-15 pkotwicz [Android] Re-enable custom errorprone plugins 2020-07-15 nelakaczmarek Test commit 2020-07-15 chromium-autoroll Roll Fuchsia SDK from 0.20200715.0.1 to 0.20200715.1.1 2020-07-15 hans Clang: the tip-of-tree version is now 12.0.0 2020-07-15 chromium-autoroll Roll Fuchsia SDK from 0.20200714.1.1 to 0.20200715.0.1 2020-07-15 bjoyce Use coverage on the fly for junit tests. 2020-07-14 thakis Update a TODO bug link. 2020-07-14 chromium-autoroll Roll Fuchsia SDK from 0.20200714.0.1 to 0.20200714.1.1 2020-07-14 bjoyce Set jvm arg for jacoco to false. 2020-07-14 agrieve Android: Dump logcat to logdog when gtests are listing tests 2020-07-14 chromium-autoroll Roll Fuchsia SDK from 0.20200713.3.1 to 0.20200714.0.1 2020-07-14 agrieve Add "list_java_targets.py" to make it easy to build all java targets 2020-07-14 chromium-autoroll Roll Fuchsia SDK from 0.20200713.1.1 to 0.20200713.3.1 2020-07-13 sebmarchand Disable the segment heap by default and add a GN flag to control it. 2020-07-13 agrieve Android: Reduce link pool when R8 or Android Lint is enabled. 2020-07-13 wnwen Android: Add deps' transitive classes to classpath 2020-07-13 hypan Reland "emulator: Disable the feature GLDMA." 2020-07-13 thakis win: Don't pass -mllvm flags to ms assembler. 2020-07-13 zhin [Py3] Make mac_toolchain Python 3 compatible 2020-07-13 agrieve Android: Make android_test_apk() define target with name=target_name 2020-07-13 chromium-autoroll Roll Fuchsia SDK from 0.20200713.0.1 to 0.20200713.1.1 2020-07-13 chromium-autoroll Roll Fuchsia SDK from 0.20200712.3.1 to 0.20200713.0.1 2020-07-13 chromium-autoroll Roll Fuchsia SDK from 0.20200712.2.1 to 0.20200712.3.1 2020-07-12 chromium-autoroll Roll Fuchsia SDK from 0.20200712.1.1 to 0.20200712.2.1 2020-07-12 chromium-autoroll Roll Fuchsia SDK from 0.20200711.3.1 to 0.20200712.1.1 2020-07-12 chromium-autoroll Roll Fuchsia SDK from 0.20200711.2.1 to 0.20200711.3.1 2020-07-11 chromium-autoroll Roll Fuchsia SDK from 0.20200711.1.1 to 0.20200711.2.1 2020-07-11 chromium-autoroll Roll Fuchsia SDK from 0.20200710.4.1 to 0.20200711.1.1 2020-07-11 hypan Revert "emulator: Disable the feature GLDMA." 2020-07-11 chromium-autoroll Roll Fuchsia SDK from 0.20200710.2.1 to 0.20200710.4.1 2020-07-11 thakis Roll clang n358615-fb1aa286-3 : n359864-04b9a46c-1. 2020-07-10 hypan emulator: Disable the feature GLDMA. 2020-07-10 chromium-autoroll Roll Fuchsia SDK from 0.20200710.1.1 to 0.20200710.2.1 2020-07-10 ehmaldonado Allow DIR_METADATA files within res 2020-07-10 vasilyt Remove GLStreamTextureImage 2020-07-10 agrieve Reland #3 "Android: Bump default target_sdk_version 24 -> SDK used to compile" 2020-07-10 chromium-autoroll Roll Fuchsia SDK from 0.20200710.0.1 to 0.20200710.1.1 2020-07-10 sdefresne [ios] Fix intent_definition template 2020-07-10 chromium-autoroll Roll Fuchsia SDK from 0.20200708.2.1 to 0.20200710.0.1 2020-07-10 wnwen Android: Use direct classpath for android_webview 2020-07-09 wnwen Android: Prefer direct interface classpaths 2020-07-09 bsheedy Revert "Reland #2 "Android: Bump default target_sdk_version 24 -> SDK used to compile"" 2020-07-09 mheikal java_library_impl targets can now generate their own R.java files 2020-07-09 mmoss Revert "Split the cros_boards gclient var into two for fetching QEMU images." 2020-07-09 agrieve Android: Dump logcat when gtest fails to list tests 2020-07-09 mmoss Revert "Simplify Simple Chrome's gclient and GN conditionals." 2020-07-09 agrieve Android: Fix -checkdiscard regex'es to ignore comments 2020-07-09 sdefresne [ios] Add support for compiling .intentdefinition 2020-07-08 agrieve Reland #2 "Android: Bump default target_sdk_version 24 -> SDK used to compile" 2020-07-08 chromium-autoroll Roll Fuchsia SDK from 0.20200708.1.1 to 0.20200708.2.1 2020-07-08 agrieve Revert "Reland "Android: Bump default target_sdk_version 24 -> SDK used to compile"" 2020-07-08 sdefresne Reland "[ios] Add --landmines-path to build/landmines.py script" 2020-07-08 bpastene Simplify Simple Chrome's gclient and GN conditionals. 2020-07-08 agrieve Reland "Android: Bump default target_sdk_version 24 -> SDK used to compile" 2020-07-08 bsheedy Report public and internal Gold links 2020-07-08 sdefresne Revert "[ios] Add --landmines-path to build/landmines.py script" 2020-07-08 chromium-autoroll Roll Fuchsia SDK from 0.20200707.4.1 to 0.20200708.1.1 2020-07-08 sdefresne [ios] Add --landmines-path to build/landmines.py script 2020-07-08 sdefresne [ios] Fix interaction of build/clobber.py & ios/build/tools/setup-gn.py 2020-07-08 chromium-autoroll Roll Fuchsia SDK from 0.20200707.3.1 to 0.20200707.4.1 2020-07-08 thomasanderson [XProto] Remove usage of XRRUpdateConfiguration and XRandR 2020-07-07 bpastene Split the cros_boards gclient var into two for fetching QEMU images. 2020-07-07 bpastene chromeos: Correctly set the '--flash' arg for host-side tests. 2020-07-07 chromium-autoroll Roll Fuchsia SDK from 0.20200707.1.1 to 0.20200707.3.1 2020-07-07 bpastene chromeos: Treat all unknown-args as the cmd to run in host-side tests. 2020-07-07 chromium-autoroll Roll Fuchsia SDK from 0.20200706.3.1 to 0.20200707.1.1 2020-07-07 jiancai Redirect clang crash diagnosese 2020-07-07 chromium-autoroll Roll Fuchsia SDK from 0.20200706.2.1 to 0.20200706.3.1 2020-07-06 mthiesse Move Activity finishing for Instrumentation tests to BaseChromiumAndroidJUnitRunner 2020-07-06 wnwen Android: Refactor write_build_config.py java paths 2020-07-06 mheikal Improve pydeps related errors 2020-07-06 steimel Add libdbus to tsan_suppressions 2020-07-06 wnwen Android: Fix comments in compile_java.py 2020-07-06 chromium-autoroll Roll Fuchsia SDK from 0.20200706.0.1 to 0.20200706.2.1 Roll buildtools/ 6b951673d..eb3987ec7 (2 commits)6b951673d1..eb3987ec70
$ git log 6b951673d..eb3987ec7 --date=short --no-merges --format='%ad %ae %s' 2020-07-06 estaab Roll GN from b6203d18..d585128c 2020-07-06 bpastene Update chromium's DEPS-file presubmits with new 'Str' type. Roll testing/ a711b1132..cadd4e1eb (71 commits)a711b11325..cadd4e1eb3
$ git log a711b1132..cadd4e1eb --date=short --no-merges --format='%ad %ae %s' 2020-07-17 jdoerrie [Passwords] Enable Touch To Fill by default 2020-07-17 sky history: renames ThumbnailDatabase to FaviconDatabase 2020-07-17 wylieb Update client testing config to match server group 2020-07-17 cduvall Add system_webview_google_apk compile target to perf bots 2020-07-17 bsheedy Target Mac 10.15.5 for GPU Intel stable 2020-07-17 jeffyoon [ios] ios14 tests on chromium.tests.ios14 2020-07-16 dpranke Update //testing/buildbot to remove no-longer-used test types. 2020-07-16 thegreenfrog [ios] Add Testing Config for Fullscreen Finch Config 2020-07-16 liaoyuke [lacros] Encapsulates lacros test runner with test_env or xvfb 2020-07-16 dpranke Remove some unused code paths in the test() GN template. 2020-07-16 behdadb Low cpu_Wall_time_ratio can invalidate failures 2020-07-16 bsheedy Target experimental Win10 NVIDIA machines 2020-07-16 robertma Fix --additional-expectations for disable-site-isolation-trials 2020-07-16 jdeblasio [MIX-DL] Update field trial testing config for m85 2020-07-16 behdadb Updated upper limits of rep_perf_tests including CPU_wall_time_ratios 2020-07-16 sgilhuly Enable more cc_unittests for Skia Dawn 2020-07-16 andzaytsev Privacy elevated on Android: added to the field trial config 2020-07-16 sreejakshetty [bfcache] Cleanup empty test filters 2020-07-16 rsesek Forward invoker.frameworks in fuzzer_test template. 2020-07-16 liaoyuke [code coverage] Clean up code coverage merge script 2020-07-16 liaoyuke [lacros] Generate a test runner wrapper for lacros 2020-07-16 justincohen ios: Pause EmbedderBlockRestoreUrl and remove config. 2020-07-15 svenzheng Fix linux-lacros-tester-rel failure 2020-07-15 johnidel Add fieldtrial testing config for Heavy Ads 2020-07-15 svenzheng LUCI config for linux-lacros 2020-07-15 dpranke Reland "Add a first pass of the desktop test wrapper scripts." 2020-07-14 kimstephanie Revert "Add mac-official builder" 2020-07-14 jeffyoon [pgo] deprecate --no-sparse from merge scripts 2020-07-14 kimstephanie Add mac-official builder 2020-07-14 fhorschig [PwdCheckAndroid] Configure trybots to execute controller tests 2020-07-14 seblalancette [iOS] Fix QR Code Generation Study Name 2020-07-14 jochen Remove code that allows non-CORS whitelisted extra headers from intents 2020-07-14 tby Update field trial testing config for launcher experiments. 2020-07-14 bsheedy Switch GPU Mac Intel Exp to 10.15.5 2020-07-13 hypan emulator: Disable flaky tests in content_shell_test_apk on MM 2020-07-13 xinghuilu Split real time lookup with desktop and Android in field trials. 2020-07-13 steveroe Add fuchsia-fyi-arm64-dbg CI and try builder. 2020-07-11 jam Increase sharding of storage_service content_browsertest on CrOS debug to match content_browsertests. 2020-07-10 vikassoni Add fieldtrial config for DisableGles2ForOopR. 2020-07-10 isamsonov Add flag expectations file to high dpi builder. 2020-07-10 lpz Set --chunk-type=hash in run_wpt_tests.py. 2020-07-10 kerneis Implement OSMetrics::FillOSMemoryDump on Fuchsia 2020-07-10 chanli Remove step_name from telemetry_gpu_integration_test's test_id_prefix 2020-07-09 tbansal Enable idle unused socket timeout of 60 seconds on desktop 2020-07-09 ccameron Increase limit for aquarium_20k average frame time 2020-07-09 michaeldo Roll bots to Xcode 12 beta 2 2020-07-09 rockot Revert "Reland "Add MojoDedicatedThread field trial testing config"" 2020-07-09 dullweber Enable ImprovedCookieControls by default 2020-07-09 masonfreed Add Webview fieldtrial testing config for WebComponentsV0 2020-07-08 jam Increase sharding for browser test suites on Linux ASan Tests (sandboxed). 2020-07-08 sreejakshetty [bfcache] Filter out newly failing content_browsertests 2020-07-08 kimstephanie Add win-official and win32-official 2020-07-08 kimstephanie Mac10.15 to main waterfall with no_nacl 2020-07-08 sreejakshetty [bfcache] Filter out newly failing content_unittests 2020-07-08 hazems AW UMA: delete fieldtrial config for WebViewCollectNonEmbeddedMetrics 2020-07-08 alcooper Remove vr_testapp from bots 2020-07-07 svenzheng Pixel tests add retry and disable some tests 2020-07-07 hypan android: Temporarily remove content_browsertests from L CQ builder 2020-07-07 bpastene Remove all unused build & test configs for betty CrOS testers. 2020-07-07 sreejakshetty [bfcache] Filter out newly failing content_browsertests 2020-07-07 dhoss Add CupsIppPrintingBackend experiment to field trial testing config 2020-07-07 wenbinzhang [benchmarking] Disable android-go-perf tester from uploading perf data 2020-07-07 dpranke Reland "Remove //chrome/test wrapper targets for angle." 2020-07-07 bpastene Enable pre-test flashing on all internal CrOS device tests. 2020-07-07 mbonadei Smoke tests to check Abseil is built with ABSL_OPTION_HARDENED=1. 2020-07-07 sreejakshetty [bfcache] Filter out new content_unittests failures 2020-07-07 sreejakshetty [bfcache] Filter out newly failing chrome_public_test_apk 2020-07-07 ricea Add WebSocketReassembleShortMessages config 2020-07-07 sreejakshetty [bfcache] Filter out newly failing unit_tests 2020-07-07 alito Enable WebRTC-SendSideBwe-WithOverhead field trial for testing. 2020-07-07 khushalsagar cc: Enable desychronized scrolling for field trial testing. Roll third_party/googletest/ 356f2d264..a781fe29b (10 commits)356f2d264a..a781fe29bc
$ git log 356f2d264..a781fe29b --date=short --no-merges --format='%ad %ae %s' 2020-07-13 ofats Googletest export 2020-07-11 ashikpaul17 Fixed some minor typos 2020-07-09 absl-team Googletest export 2020-07-07 ofats Googletest export 2020-07-07 absl-team Googletest export 2020-07-07 absl-team Googletest export 2020-04-11 olivier.ldff use target_compile_features to use c++11 if cmake > 3.8 2020-06-19 amatanhead Make EXPECT_THROW and EXPECT_NO_THROW macros more informative 2020-05-30 eli fix compilation on OpenBSD 6.7 2020-01-22 mjvk Fixes extensions missing for QNX Roll third_party/spirv-tools/ bd2a9ea85..717e7877c (35 commits)bd2a9ea852..717e7877ca
$ git log bd2a9ea85..717e7877c --date=short --no-merges --format='%ad %ae %s' 2020-07-17 alanbaker Store location values sparsely (#3488) 2020-07-17 dneto Permit Simple and GLSL450 memory model in WEBGPU_0 (#3463) 2020-07-17 antonikarp spirv-fuzz: support floating-point in TransformationInvertComparisonOperator (#3551) 2020-07-17 stefanomil Change MaybeApplyTransformation to return a boolean (#3555) 2020-07-17 stefanomil spirv-fuzz: Implement MaybeApplyTransformation helper function (#3540) 2020-07-17 stefanomil spirv-fuzz: Assert false in IsApplicable method of TransformationAccessChain (#3528) 2020-07-16 vasniktel spirv-fuzz: Add support for OpBitcast to TransformationEquationInstruction (#3523) 2020-07-16 vasniktel spirv-fuzz: Add support for OpConvert to TransformationEquationInstruction (#3472) 2020-07-15 alanbaker Fix reachability in the validator (#3541) 2020-07-15 vasniktel spirv-fuzz: Remove TransformationCopyObject (#3531) 2020-07-15 vasniktel spirv-opt: Add support for OpLabel to dominator analysis (#3516) 2020-07-15 stefanomil spirv-fuzz: Fuzzer pass to interchange zero-like constants (#3524) 2020-07-15 afdx spirv-fuzz: Add replay range option (#3535) 2020-07-14 jaebaek Rewrite KillDebugDeclares() (#3513) 2020-07-14 andreperezmaselco.developer spirv-fuzz: Fix instruction insertion issue (#3521) 2020-07-14 andreperezmaselco.developer spirv-fuzz: Implement the OpMatrixTimesMatrix linear algebra case (#3527) 2020-07-14 greg Add support to GPU-AV instrumentation for Task and Mesh shaders (#3512) 2020-07-14 andreperezmaselco.developer spirv-fuzz: Support adding dead break from back-edge block (#3519) 2020-07-14 andreperezmaselco.developer Support OpPhi when replacing boolean constant operand (#3518) 2020-07-12 vasniktel spirv-fuzz: TransformationAddSynonyms (#3447) 2020-07-11 vasniktel spirv-fuzz: Remove unused functions (#3510) 2020-07-11 vasniktel spirv-fuzz: Minor refactoring (#3507) 2020-07-10 greg Preserve OpenCL.DebugInfo.100 through elim-local-single-store (#3498) 2020-07-10 jaebaek Preserve debug info in vector DCE pass (#3497) 2020-07-10 stefano.milizia00 Implement transformation to record synonymous constants. (#3494) 2020-07-09 jaebaek Fix build failure (#3508) 2020-07-09 greg Upgrade elim-local-single-block for OpenCL.DebugInfo.100 (#3451) 2020-07-09 vasniktel spirv-fuzz: TransformationReplaceParameterWithGlobal (#3434) 2020-07-09 andreperezmaselco.developer Implement the OpMatrixTimesVector linear algebra case (#3500) 2020-07-08 jaebaek Preserve OpenCL.100.DebugInfo in reduce-load-size pass (#3492) 2020-07-08 andreperezmaselco.developer spirv-fuzz: Add image sample unused components transformation (#3439) 2020-07-07 andreperezmaselco.developer spirv-fuzz: Add variables with workgroup storage class (#3485) 2020-07-07 andreperezmaselco.developer spirv-fuzz: Implement the OpVectorTimesMatrix linear algebra case (#3489) 2020-07-07 vasniktel spirv-fuzz: fuzzerutil::MaybeGetConstant* #3487 2020-07-06 jaebaek Debug info preservation in copy-prop-array pass (#3444) Roll tools/clang/ b49c12a8f..6412135b3 (10 commits)b49c12a8f3..6412135b39
$ git log b49c12a8f..6412135b3 --date=short --no-merges --format='%ad %ae %s' 2020-07-15 aeubanks Set -DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF 2020-07-15 hans Clang: fix syntax error in build.py 2020-07-15 hans Clang: the tip-of-tree version is now 12.0.0 2020-07-14 lukasza Teach the rewriter about additional thirdy-party paths. 2020-07-12 bartekn Fix a field and add more to manual-fields-to-ignore.txt 2020-07-11 thakis Roll clang n358615-fb1aa286-3 : n359864-04b9a46c-1. 2020-07-10 thakis clang/win bots: Switch to gnuwin-13. 2020-07-08 lukasza Only exclude const-qualified char pointers. 2020-07-08 lukasza Make raw-output-tests ignore changes in absolute path of Chromium repo. 2020-07-07 glenrob Always remove gomacc in compile_db.py, so clang is called directly. Created with: roll-dep build buildtools testing third_party/binutils third_party/googletest third_party/spirv-headers third_party/spirv-tools tools/clang R=rharrison@google.com Change-Id: I1f5a20578b6909f556270c807b6be048a97182db Change-Id: I8cf650a6be72c832bf50e74b4aed1ed1aff9b661 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25160 Reviewed-by: David Neto <dneto@google.com>
Tint
Tint is a compiler for the WebGPU Shader Language (WGSL).
This is not an officially supported Google product.
Requirements
- Git
- CMake (3.10.2 or later)
- Ninja (or other build tool)
- Python, for fetching dependencies
- depot_tools in your path
Build options
TINT_BUILD_SPV_READER
: enable the SPIR-V input reader (off by default)TINT_BUILD_WGSL_READER
: enable the WGSL input reader (on by default)TINT_BUILD_SPV_WRITER
: enable the SPIR-V output writer (on by default)TINT_BUILD_WGSL_WRITER
: enable the WGSL output writer (on by default)TINT_BUILD_FUZZERS
: enable building fuzzzers (off by default)
Building
Tint uses Chromium dependency management so you need to install depot_tools and add it to your PATH.
Getting source & dependencies
# Clone the repo as "tint"
git clone https://dawn.googlesource.com/tint tint && cd tint
# Bootstrap the gclient configuration
cp standalone.gclient .gclient
# Fetch external dependencies and toolchains with gclient
gclient sync
Compiling using CMake + Ninja
mkdir -p out/Debug
cd out/Debug
cmake -GNinja ../..
ninja # or autoninja
Compiling using CMake + make
mkdir -p out/Debug
cd out/Debug
cmake ../..
make # -j N for N-way parallel build
Compiling using gn + ninja
mkdir -p out/Debug
gn gen out/Debug
autoninja -C out/Debug
Fuzzers on MacOS
If you are attempting fuzz, using TINT_BUILD_FUZZERS=ON
, the version of llvm
in the XCode SDK does not have the needed libfuzzer functionality included.
The build error that you will see from using the XCode SDK will look something like this:
ld: file not found:/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/11.0.0/lib/darwin/libclang_rt.fuzzer_osx.a
The solution to this problem is to use a full version llvm, like what you would
get via homebrew, brew install llvm
, and use something like CC=<path to full clang> cmake ..
to setup a build using that toolchain.
Checking [chromium-style] issues in CMake builds
The gn based work flow uses the Chromium toolchain for building in anticipation of integration of Tint into Chromium based projects. This toolchain has additional plugins for checking for style issues, which are marked with [chromium-style] in log messages. This means that this toolchain is more strict then the default clang toolchain.
In the future we will have a CQ that will build this work flow and flag issues
automatically. Until that is in place, to avoid causing breakages you can run
the [chromium-style] checks using the CMake based work flows. This requires
setting CC
to the version of clang checked out by gclient sync
and setting
the TINT_CHECK_CHROMIUM_STYLE
to ON
.
mkdir -p out/style
cd out/style
cmake ../..
CC=../../third_party/llvm-build/Release+Asserts/bin/clang cmake -DTINT_CHECK_CHROMIUM_STYLE=ON ../../ # add -GNinja for ninja builds
Issues
Please file any issues or feature requests at https://bugs.chromium.org/p/tint/issues/entry
Contributing
Please see the CONTRIBUTING and CODE_OF_CONDUCT files on how to contribute to Tint.